fjh
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Posts
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Everything posted by fjh
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I totally agree with this check the ECU plug .Also the VECU plug under the dash if it gets wet it can cause issues if the wind shield has been leaking!
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If its wired correctly it should have relays in the fuse panel just swap out a like relay in the panel with something else hi beam or some thing see if it changes the situation!
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Fuel pressure is too low under load ! Check for a broken spring in the fuel return T or a restriction on the fuel lines or filters!Needs a minimum 20 to get full power!
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Replace the relays!
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Temove the line to the afc and suck on it if you can suck or blow thru it the diaphragm may have a hole in it! Also check your linkage and stop for going full on full off!
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If the the shut down is not accompanied by a malfunction light nothing will be logged! just something to try, reflash the ECU! also just a thought ,I Wonder if something was set in the over speed section of the EECU that you changed ! either way a reflash my correct this!
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Maybe a Friday/ payday Trans! Shit happens unfortunately! The important thing is that the warranty will cover it ! The unfortunate thing is that warranty doesn't pay for down time!
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Interested to see how this plays out! We one had a truck sit at our shop waiting for drive shafts for a month while someone had to make a decision the the wrong drive shafts got installed at the factory on a tri drive! Took out the rear bearing on the middle diff!
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👍💰
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As mentioned change it out to the air fan they are rubish! Do it once and be done with it! Chances are the new one will be kick right out of the box! Note you will have to have the program changed to suit the air fan!
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Tire need to be roughly 3/4 to 1 of an inch below the top frame rail loaded or not! There is a proper gauge for this how ever this is a get by! Experiment with it! There is an 18 mm head bolt that holds the ride valve to the frame loosen and tweak the bracket. And tighten bolt the bags and refill and check the height it’s easier if you on a flat slab and measure from the slab to the frame at the back it’s all doable from the outside!there is usually a hole you can bar through to change the mount bracket height!
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Air suspension? Ride height ?
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You should be changing your oil then!!!
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E7 low power help!
fjh replied to Dtech's topic in Antique and Classic Mack Trucks General Discussion
Bro! So post the model and year of truck and last six of the vin there are guys on here that may be able to help either the vecu wiring set up . I no longer have access to this stuff ! There are a few here that may! I would think there would be voltage down one wire to that switch! And back to ground at the vecu! Does the power show up at the wire at the switch?at the transmission? If so a full 12v or .7 -
E7 low power help!
fjh replied to Dtech's topic in Antique and Classic Mack Trucks General Discussion
That is the switch the wire I’m not sure! Have you checked for boost leaks black smoke is a good sign! You got fuel! lack of air may be your issue! Air filter new? Check the turbo ! Check thectube at the compressor inlet and at the manifold left side for holes also by pass your air drier temporarily for something to try! They can dump boost as well! -
E7 low power help!
fjh replied to Dtech's topic in Antique and Classic Mack Trucks General Discussion
So I need to ask what trans do you have and are there any codes coming up other the the inlet air ? If you have a 18 speed Tran s un plug the low range switch at the rear shift cylinder see if this changes things! If the wiring to this switch has rubbed together anywhere between the switch and the vecu it will de rate the power by 50 percent! This will not throw a code the computer will think this is normal!follow that trouble chart you have posted there if you can locate the two wires to the switch cut or remove them from the vecu plug this way the vecu will never see a closed switch! -
Agree totally with this statement ! spring brake is the most common failure with this symptom, there are a few other issues that can happen How ever yours fell in to the most common category ! Thanx for posting the fix!
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All good bro ! Took the leaky boom cyl out had it repaired and repaired to the tune of 1600 other than that it’s working out well! Haven’t had much seat time yet been busy with other shit! Thanks for asking! I think after using the 4x4 I can hear a bad u joint in one or both of the for lack of a better term cvc joints bit of clattering on turns! May have to address these at some point apparently there are 2 u joints per side! not to much info on line but haven't searched hard on this yet been too busy with other stuff!
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Yup to avoid buying tools pull it stand it up on a wheel rim of the appropriate size or two 6x6 wooden blocks and pop the back cover ! Recommend checking the rear bearings on the main case while you’re there how ever not nessary just a precaution!
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Agree with Paul ! If you have the access to an 18 speed fuller( out of a Mack) then that would be an alternative ! That said you will loose all your back up speeds fuller has 2 your 12 speed has 5 ! The problem may involve a broken shift fork or shift rail ! the model of your unit makes for a difficult remove narrow frame ! You could pull the floor plate remove the center shift lid and look at the rails and forks how ever it sounds like the trans has to come out! Can you post a picture of the piece you have found on the drain plug! the only dog clutches in this are on the splitter and you still have hi /low Correct?
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Plan A just sayin! It’s a pricey project however! Is what it is!
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Nice my favourite! Model bar none for a dump truck !stand up oil change!😂It’s best to pull the transmission hatch if the box controls haven’t been mounted over it you might get lucky most box guys don’t consider that someone may have to pull the transmission some day! The trans can stay in the truck to do the back section but likely have to go to the dealer to have it done! Still check the yoke bolt and fork bolt also answer joes question there that is important too for proper diagnostics!
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Cl713 likly has a Cummins in it! Check the rear output yoke for tightness! These were quite an issue behind the Cummins ! If it’s tight remove the top rear shift lid and check the shift fork bolt ! If it’s tight then the back section of the trans may have to com off and neew synchro plates installed!
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Ahh I’m a bit out of touch on lumber prices i I just pull up a log and make my own stuff! 2/4 2/10 2x 8 cost about a buck a foot to make including fuel and logging costs! Not wear and tare on the equipment thou! And me!😞
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Yup good thought Joe ! That said had this happen many times ! Shit got in the injector on installing of the line just my observation! AC engine particularly bad for this because of all the crap in the way !Replace the injector! Good to go! Cylinder not getting fuel! just sayin!
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